Stata The Stata listserver
[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]

st: xtnbreg question


From   "Jennifer S. Earl" <jearl@soc.ucsb.edu>
To   statalist@hsphsun2.harvard.edu
Subject   st: xtnbreg question
Date   Fri, 12 Mar 2004 16:44:18 -0800

I have time series data on a set of variables for one nation for a period of about 40 years. My dependent variable is a count variable. After looking over the Stata manuals for xtnbreg, I am not sure how to accommodate the fact that while I have time series data, these data are not composed of cross-sections with multiple units in each cross section (e.g. I do not have data for multiple nations in each year, just data on one nation for multiple years).

The manuals seems to suggest that Stata wants to handle data where i=panel identifier (e.g., an id number for a person who contributes data for multiple years, or a country id when multiple countries are present in the time series) and t=time identifier (e.g., year) in xtnbreg. Further xtnbreg *requires* that "i" is set either in the xtnbreg command or using "iis (varname)", even though it does not require "t" to be set.

I have two questions: (1) should I be using a command other than xtnbreg to analyze this time-series count data; and (2) if xtnbreg is appropriate, will using the following settings:

iis year
tis year
xtnbreg dep_count_var ind_var1 ind_var2...

produce appropriate results?

Thanks in advance,

Jennifer


*
* For searches and help try:
* http://www.stata.com/support/faqs/res/findit.html
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/




© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index